Hydrogen and carbon dioxide (CO2) conversion issues are crucial to addressing global energy, climate and sustainable development challenges. Also in order to promote a sustainable energy future, continuous investments in research and development related to these two areas (H2 production and CO2 conversion) are needed to reach their full potential in reducing environmental impacts. The NéOCAT project is part of this dynamic since it aims to optimize heterogeneous electro/photocatylators for the generation and conversion of energy vectors (H2 and CO2). The equipment acquired via NéOCAT will make it possible to complete the instrumentation of the H2 photoelectrogeneration (and CO2 conversion) platform that will be acquired as part of the CPER MODE project. Electrochemical and photocatalytic catalysts for hydrogen production and CO2 conversion are at the heart of clean energy research. Challenges include finding more affordable, efficient and sustainable catalytic materials, as well as understanding the underlying reaction mechanisms. In addition, the selection and optimization of catalysts by NéOCAT will then allow the scaling of these technologies for industrial use.